RSS639 JBOD Rugged 6U Storage System

High Density Storage

In an industry where 28” chassis depths are common, Crystal Group provides a storage system that is 20” deep with the latest capabilities. With an all aluminum chassis weighing in at 160-175 lbs., the RSS639 provides significant storage in a small package.


RSS639 Rugged 6U Storage System

  • Rugged 6U, rack mounted 20″ depth, easily mounted on Jonathan® rails
  • Rear I/O offers four (4) SFF-8088 SAS connections
  • N+1 power supply
  • Offers maximum airflow with six (6) high speed, high volume low noise fans
  • Versatility with up to thirty-nine (39) 3.5″ HDDs, top load drive design, up to 156 TB
  • All aluminum construction – 160-175 lbs.


Environmental Standards
MIL-STD-810, Operational Temperature, Method 501/502 Procedure I/II

-15°C to +50°C,
-40°C operational with SSD

MIL-STD-810, Storage, Method 501, Procedure I/II

-55°C to +85°C

MIL-STD-810, Humidity, Method 507, Procedure II

240 hours with humidity kit

MIL-STD-810, Altitude, Method 500

12,500ft operation, 40,000ft transport

MIL-STD-810, Vibration, Method 514, Procedure I

3 GRMS, 5-500Hz, 75 min/axis, with SSDs

MIL-S-901, Grade B, Class 2, Type B

With solid state drives + vibration kits

Electromagnetic Compatibility Standards
Some standards may require an internal kit
FCC Class A
Form Factor
10.5" (26.67cm)
17.5" (44.45cm)
20.125" (51.12cm)
160 - 175 lbs ( 72.57 - 79.38 kgs ) (with 3.5" drives)
External Bays
Thirty-nine (39) top-loading, hot-swappable, rugged 2.5” or 3.5” HDDs

Six (6) High speed, thermostatically controlled, low noise fans

Jonathan rails
Power Supply
1350W 120/240VAC 50/60Hz N+1 w/PFC, 115VAC 400Hz
Export Compliance
ECCN: 5A992 | Classification is dependent on configuration and is subject to change. Please contact your Business Development Manager to receive the classification of your product.


This product is currently deployed on the following program:

Gorgon Stare for the US Air Force 

Reports, Guides & Drawings

RSS639 Storage System- Outline Installation Drawing
RSS639 Hardware Guide